c67ce887f2
- Add volume.MetricsProvider function to Volume interface. - Add volume.MetricsDu for providing metrics via executing "du". - Add volulme.MetricsNil for unsupported Volumes.
318 lines
11 KiB
Go
318 lines
11 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package host_path
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import (
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"fmt"
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"io/ioutil"
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"os"
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"testing"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/testapi"
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"k8s.io/kubernetes/pkg/client/unversioned/testclient"
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"k8s.io/kubernetes/pkg/types"
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"k8s.io/kubernetes/pkg/util"
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"k8s.io/kubernetes/pkg/volume"
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)
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func TestCanSupport(t *testing.T) {
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("fake", nil, nil))
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plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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if plug.Name() != "kubernetes.io/host-path" {
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t.Errorf("Wrong name: %s", plug.Name())
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}
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if !plug.CanSupport(&volume.Spec{Volume: &api.Volume{VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{}}}}) {
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t.Errorf("Expected true")
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}
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if !plug.CanSupport(&volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{}}}}}) {
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t.Errorf("Expected true")
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}
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if plug.CanSupport(&volume.Spec{Volume: &api.Volume{VolumeSource: api.VolumeSource{}}}) {
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t.Errorf("Expected false")
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}
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}
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func TestGetAccessModes(t *testing.T) {
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
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plug, err := plugMgr.FindPersistentPluginByName("kubernetes.io/host-path")
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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if len(plug.GetAccessModes()) != 1 || plug.GetAccessModes()[0] != api.ReadWriteOnce {
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t.Errorf("Expected %s PersistentVolumeAccessMode", api.ReadWriteOnce)
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}
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}
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func TestRecycler(t *testing.T) {
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plugMgr := volume.VolumePluginMgr{}
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pluginHost := volume.NewFakeVolumeHost("/tmp/fake", nil, nil)
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plugMgr.InitPlugins([]volume.VolumePlugin{&hostPathPlugin{nil, volume.NewFakeRecycler, nil, nil, volume.VolumeConfig{}}}, pluginHost)
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spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/foo"}}}}}
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plug, err := plugMgr.FindRecyclablePluginBySpec(spec)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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recycler, err := plug.NewRecycler(spec)
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if err != nil {
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t.Errorf("Failed to make a new Recyler: %v", err)
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}
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if recycler.GetPath() != spec.PersistentVolume.Spec.HostPath.Path {
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t.Errorf("Expected %s but got %s", spec.PersistentVolume.Spec.HostPath.Path, recycler.GetPath())
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}
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if err := recycler.Recycle(); err != nil {
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t.Errorf("Mock Recycler expected to return nil but got %s", err)
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}
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}
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func TestDeleter(t *testing.T) {
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tempPath := fmt.Sprintf("/tmp/hostpath/%s", util.NewUUID())
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defer os.RemoveAll(tempPath)
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err := os.MkdirAll(tempPath, 0750)
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if err != nil {
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t.Fatalf("Failed to create tmp directory for deleter: %v", err)
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}
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
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spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: tempPath}}}}}
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plug, err := plugMgr.FindDeletablePluginBySpec(spec)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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deleter, err := plug.NewDeleter(spec)
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if err != nil {
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t.Errorf("Failed to make a new Deleter: %v", err)
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}
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if deleter.GetPath() != tempPath {
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t.Errorf("Expected %s but got %s", tempPath, deleter.GetPath())
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}
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if err := deleter.Delete(); err != nil {
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t.Errorf("Mock Recycler expected to return nil but got %s", err)
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}
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if exists, _ := util.FileExists("foo"); exists {
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t.Errorf("Temp path expected to be deleted, but was found at %s", tempPath)
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}
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}
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func TestDeleterTempDir(t *testing.T) {
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tests := map[string]struct {
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expectedFailure bool
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path string
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}{
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"just-tmp": {true, "/tmp"},
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"not-tmp": {true, "/nottmp"},
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"good-tmp": {false, "/tmp/scratch"},
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}
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for name, test := range tests {
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
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spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: test.path}}}}}
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plug, _ := plugMgr.FindDeletablePluginBySpec(spec)
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deleter, _ := plug.NewDeleter(spec)
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err := deleter.Delete()
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if err == nil && test.expectedFailure {
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t.Errorf("Expected failure for test '%s' but got nil err", name)
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}
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if err != nil && !test.expectedFailure {
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t.Errorf("Unexpected failure for test '%s': %v", name, err)
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}
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}
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}
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func TestCreater(t *testing.T) {
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tempPath := "/tmp/hostpath/"
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defer os.RemoveAll(tempPath)
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err := os.MkdirAll(tempPath, 0750)
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("/tmp/fake", nil, nil))
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spec := &volume.Spec{PersistentVolume: &api.PersistentVolume{Spec: api.PersistentVolumeSpec{PersistentVolumeSource: api.PersistentVolumeSource{HostPath: &api.HostPathVolumeSource{Path: tempPath}}}}}
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plug, err := plugMgr.FindCreatablePluginBySpec(spec)
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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creater, err := plug.NewCreater(volume.VolumeOptions{CapacityMB: 100, PersistentVolumeReclaimPolicy: api.PersistentVolumeReclaimDelete})
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if err != nil {
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t.Errorf("Failed to make a new Creater: %v", err)
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}
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pv, err := creater.Create()
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if err != nil {
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t.Errorf("Unexpected error creating volume: %v", err)
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}
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if pv.Spec.HostPath.Path == "" {
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t.Errorf("Expected pv.Spec.HostPath.Path to not be empty: %#v", pv)
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}
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expectedCapacity := resource.NewQuantity(100*1024*1024, resource.BinarySI)
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actualCapacity := pv.Spec.Capacity[api.ResourceStorage]
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expectedAmt := expectedCapacity.Value()
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actualAmt := actualCapacity.Value()
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if expectedAmt != actualAmt {
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t.Errorf("Expected capacity %+v but got %+v", expectedAmt, actualAmt)
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}
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if pv.Spec.PersistentVolumeReclaimPolicy != api.PersistentVolumeReclaimDelete {
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t.Errorf("Expected reclaim policy %+v but got %+v", api.PersistentVolumeReclaimDelete, pv.Spec.PersistentVolumeReclaimPolicy)
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}
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os.RemoveAll(pv.Spec.HostPath.Path)
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}
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func TestPlugin(t *testing.T) {
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("fake", nil, nil))
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plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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spec := &api.Volume{
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Name: "vol1",
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VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/vol1"}},
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}
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pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
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builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{})
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if err != nil {
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t.Errorf("Failed to make a new Builder: %v", err)
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}
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if builder == nil {
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t.Errorf("Got a nil Builder")
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}
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path := builder.GetPath()
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if path != "/vol1" {
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t.Errorf("Got unexpected path: %s", path)
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}
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if err := builder.SetUp(); err != nil {
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t.Errorf("Expected success, got: %v", err)
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}
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cleaner, err := plug.NewCleaner("vol1", types.UID("poduid"))
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if err != nil {
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t.Errorf("Failed to make a new Cleaner: %v", err)
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}
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if cleaner == nil {
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t.Errorf("Got a nil Cleaner")
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}
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if err := cleaner.TearDown(); err != nil {
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t.Errorf("Expected success, got: %v", err)
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}
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}
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func TestPersistentClaimReadOnlyFlag(t *testing.T) {
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pv := &api.PersistentVolume{
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ObjectMeta: api.ObjectMeta{
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Name: "pvA",
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},
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Spec: api.PersistentVolumeSpec{
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PersistentVolumeSource: api.PersistentVolumeSource{
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HostPath: &api.HostPathVolumeSource{Path: "foo"},
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},
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ClaimRef: &api.ObjectReference{
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Name: "claimA",
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},
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},
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}
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claim := &api.PersistentVolumeClaim{
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ObjectMeta: api.ObjectMeta{
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Name: "claimA",
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Namespace: "nsA",
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},
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Spec: api.PersistentVolumeClaimSpec{
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VolumeName: "pvA",
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},
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Status: api.PersistentVolumeClaimStatus{
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Phase: api.ClaimBound,
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},
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}
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o := testclient.NewObjects(api.Scheme, api.Scheme)
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o.Add(pv)
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o.Add(claim)
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client := &testclient.Fake{}
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client.AddReactor("*", "*", testclient.ObjectReaction(o, testapi.Default.RESTMapper()))
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost("/tmp/fake", client, nil))
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plug, _ := plugMgr.FindPluginByName(hostPathPluginName)
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// readOnly bool is supplied by persistent-claim volume source when its builder creates other volumes
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spec := volume.NewSpecFromPersistentVolume(pv, true)
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pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
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builder, _ := plug.NewBuilder(spec, pod, volume.VolumeOptions{})
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if !builder.GetAttributes().ReadOnly {
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t.Errorf("Expected true for builder.IsReadOnly")
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}
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}
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// TestMetrics tests that MetricProvider methods return sane values.
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func TestMetrics(t *testing.T) {
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// Create an empty temp directory for the volume
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tmpDir, err := ioutil.TempDir(os.TempDir(), "host_path_test")
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if err != nil {
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t.Fatalf("Can't make a tmp dir: %v", err)
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}
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defer os.RemoveAll(tmpDir)
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plugMgr := volume.VolumePluginMgr{}
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plugMgr.InitPlugins(ProbeVolumePlugins(volume.VolumeConfig{}), volume.NewFakeVolumeHost(tmpDir, nil, nil))
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plug, err := plugMgr.FindPluginByName("kubernetes.io/host-path")
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if err != nil {
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t.Errorf("Can't find the plugin by name")
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}
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spec := &api.Volume{
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Name: "vol1",
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VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: tmpDir}},
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}
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pod := &api.Pod{ObjectMeta: api.ObjectMeta{UID: types.UID("poduid")}}
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builder, err := plug.NewBuilder(volume.NewSpecFromVolume(spec), pod, volume.VolumeOptions{})
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if err != nil {
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t.Errorf("Failed to make a new Builder: %v", err)
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}
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// TODO(pwittroc): Move this into a reusable testing utility
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metrics, err := builder.GetMetrics()
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if err != nil {
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t.Errorf("Unexpected error when calling GetMetrics %v", err)
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}
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if metrics.Used.Value() != 4096 {
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t.Errorf("Expected Used %d to be 4096", metrics.Used)
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}
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if metrics.Capacity.Value() <= 0 {
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t.Errorf("Expected Capacity to be greater than 0")
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}
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if metrics.Available.Value() <= 0 {
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t.Errorf("Expected Available to be greater than 0")
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}
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}
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